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Minilec
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Minilec VSP D1 Phase Failure Relay, Single Phase Preventor, 1 CO (240V/415V AC)
Incl. all taxes • Shipping calculated at checkout.
Free delivery on orders above ₹3,000 · Delivery charges
1-year manufacturer warranty · Burnt or wiring damage not covered · Warranty terms
🚚 Delivery in 2-3 days (Delhi NCR, UP & Haryana), 5-6 days elsewhere
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Description
VSP D1 is a single-phase preventor with a fixed unbalance threshold and auto reset, verified against Minilec’s own official product page. It is also called a phase failure relay or single phasing preventer: it trips the motor starter when a phase is lost or the three phase voltages are unbalanced by more than about 40 V, protecting the motor from overheating.
Minilec model VSP D1 is also written as VSPD1.
Technical specifications
| Make | Minilec |
| Model | VSP D1 |
| Supply voltage | 240V AC, or 415V AC ±20%, 50/60Hz (system and auxiliary) |
| Unbalance trip setting | 40V ±6V (fixed) |
| Trip time delay | 3.5 ± 1.5 seconds |
| Output contacts | 1 CO |
| Reset | Auto |
| Contact rating | 5A @ 230V AC (resistive) |
| Dimensions (L x W x D) | 76 x 30.5 x 117.5mm |
| Mounting | 68mm centre-to-centre panel mount, or 35mm DIN rail |
| Weight | 320g |
Frequently asked questions about the Minilec VSP D1
What is the supply voltage of the VSP D1?
What is the unbalance trip setting of the VSP D1?
What are the output contacts of the VSP D1?
What is the reset of the VSP D1?
Where can I download the VSP D1 datasheet?
Is the VSP D1 genuine, and do you provide a GST invoice?
Can I order the VSP D1 in bulk for OEM or wholesale use?
Explore more Minilec products
Compare all phase, voltage and pump protection relays with live prices →
Choose a single phasing preventer
A single phasing preventer (phase failure relay) switches off the motor starter when a phase is lost or the three voltages become unbalanced, before the motor overheats. Choose by supply voltage, whether you also want under/over-voltage protection, the number of output contacts and the mounting.
- Minilec VSP 2: for 3-phase pump motors; 415 V; fixed unbalance trip (40 V); 1 NO; auto reset
- Minilec VSP D1 (this relay): 240 V or 415 V; fixed unbalance trip (40 V); 1 CO; auto reset
- Minilec VSP D2: 240 V or 415 V; adjustable unbalance trip (30–70 V); 2 CO; auto, manual or remote reset
- Minilec ALV D2: 415 V; fixed unbalance trip plus adjustable under/over-voltage; 2 CO
- Minilec S2 VMR 3: 415 V; adjustable unbalance (4–20%) plus adjustable under/over-voltage; 2 CO; 35 mm DIN rail
- Selec 800PSR: phase sequence, phase failure and asymmetry; 154–500 V; 1 C/O; 22.5 mm DIN rail
Prices for all of them: protection relay price list. How to set and wire one: voltage monitoring relay guide.
